Question For Military Veterans Using The VA For Their Health Care?

I got out 25 years ago with no perceived medical problems. But I now have tenitus, Plantar fasciitis, and Carpal Tunnel Syndrom, as well as 10% hearing loss in my left ear. I dont know if any of these are related to my military service but I have had bad soles of my feet since I got back from 18 months of wet soggy Philippines. Silly me has never even gone to sign up for benefits at the VA. Could they prove or disprove any of these ailments are related to my military service? My co worker says they were suggesting stuff being wrong with him like tenitis and PF (inflammed heel to toe ligaments causing sore feet) due to Rifle Range/combat hearing damage and boots. I have worn a brace on right hand since I got out just to sleep as my right hand tingles so bad at night that it wakes me up if I dont keep it immobilized. I work with crimping tools alot as a telephone repairman and wear steel toe boots 12 hours a day. Im afraid they will tell me its all related to post military work. Anyone run into a problem with them telling you your not eligible for health benefits? I'm not looking for a monthly check, but I would like to be recognized as a disabled vet for my kid's college benefits. Its not about me anymore.